These all seem like solid additions! Particularly the rearranging episodes will be a nice feature for many creators. Makes for a nice added layer of flexibility
I don't know if I'll necessarily do something like this but, for example, for my finished series I may go in and move all of the "bonus episodes" to the bottom or something as to allow for fresh readers to have a smoother, uninterrupted experience without having things like "Inksgiving from 2 years ago is coming up!" getting in the way. V cool~